Sooqr - Sooqr Search provides relevant and innovative site search engine for the website.
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
Site Search 360 - Site Search 360 enhances and improves your built-in CMS or product search with autocompletion, semantic search, filters, facets, detailed analytics, and a whole lot of customization options.
Hulbee Enterprise Search - Hulbee Enterprise Search is another powerful site search solution that intelligently retrieves information and documents regardless of their source or location.
Klevu - Klevu offers instant site search solution for eCommerce stores.
Varonis DatAnswers - Varonis DatAnswers is a leading enterprise search and discovery platform that deliver secure and relevant searches for authorized NAS, Windows files servers and share point users.